You can edit the summarize the invoice amounts by piano if you don't want to itemize services on your invoice.
FROM THE WEB APP
Step 1: Open/Create a new invoice
Step 2: Check the "Summarize amounts per piano" box.
Step 3: Done
FROM THE MOBILE APP
WHEN CREATING AN INVOICE
Step 1: Click the "Show More" button below the Invoice Details section
Step 2: Select 'Summarize amounts per piano'
Step 3: Save